A/T - 2004R Accumulator Piston & Spring
TSB 86-8 (Feb)SUBJECT: 2004R
3-4 ACCUMULATOR PISTON AND SPRING
The only difference resulting from the order of installation of the 3-4 accumulator piston and spring is the "feel" of the 3-4 shift. Durability should not be affected with either order.
The firmest 3-4 shift results from installing the spring into the case first. (Figure 1)
The softest 3-4 shift results from installing the piston into the case first (Figure 2)
Note
Sealing of the ring on the piston is important! Latest piston with "0-ring" seal is GM # 8634956